ngrep software package provides grep for network traffic, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ngrep
ngrep is installed in your system.
Make ensure the ngrep package were installed using the commands given below,
$ sudo dpkg-query -l | grep ngrep *
You will get with ngrep package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Network |
| Package | ngrep |
| Version | 1.45.ds2-12 |
| Description | grep for network traffic |
| Sub Section | Net |